Crash of a PZL-Mielec AN-2R in Sofyevka

Date & Time: May 17, 2011 at 1915 LT
Type of aircraft:
Operator:
Registration:
RA-68122
Flight Phase:
Survivors:
Yes
MSN:
1G195-27
YOM:
1982
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
8000
Circumstances:
The pilot, sole on board, was performing a crop spraying flight when the engine lost power. He elected to make an emergency landing in a field 2 kilometers from Sofyevka, in the Stavropol krai. Upon touchdown, the aircraft rolled over and came to rest upside down, bursting into flames. The pilot escaped uninjured while the aircraft was partially destroyed by fire. The wreck was evacuated and disposed away before the arrival of the accident investigation commission. Therefore, it was not possible to the MAK to determine the cause of the engine failure. As the pilot did not have any valid licence for this kind of aircraft, this PZL-Mielec AN-2R built on 11FEB1982 did not have a valid Certificate of Airworthiness. It had a double registration: FLA-34906 and RA-68122 which was the official one present in the Russian Civil Aviation registry.
Probable cause:
Engine failure in flight for undetermined reasons.
Final Report:

Crash of an Embraer ERJ-145EP in Moscow

Date & Time: Apr 28, 2011 at 1625 LT
Type of aircraft:
Operator:
Registration:
UR-DNK
Survivors:
Yes
Schedule:
Dniepropetrovsk – Moscow
MSN:
145-039
YOM:
1997
Flight number:
UDN505
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
30
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following an uneventful flight from Dniepropetrovsk, the copilot started the approach to Moscow-Sheremetyevo Airport runway 25R with the flaps down at 22°. After touchdown, he started the braking procedure but the aircraft failed to decelerate as expected. The emergency braking systems were activated without any noticeable effect. Approaching the end of the runway at a speed of 70 knots, the copilot turn to the right in an attempt to veer off runway. The airplane ground looped then contacted a grassy area and lost its undercarriage before coming to rest. All 34 occupants escaped uninjured while the aircraft was damaged beyond repair.
Probable cause:
Failure of the brakes is suspected.

Crash of a Yakovlev Yak-40K in Ust-Kamchatsk

Date & Time: Apr 16, 2011 at 1600 LT
Type of aircraft:
Operator:
Registration:
RA-88241
Flight Phase:
Survivors:
Yes
Schedule:
Ust-Kamchatsk - Petropavlovsk-Kamchatsky
MSN:
9641351
YOM:
1977
Flight number:
PTK123
Country:
Region:
Crew on board:
5
Crew fatalities:
Pax on board:
21
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The three engine aircraft was performing flight PTK123 from Petropavlovsk-Kamchatsky to Ossora. En route, the crew was informed about poor weather conditions at destination and decided to divert to the Ust-Kamchatsk Airport. Crew and passengers wait there few hours moments for weather improvement but eventually decided to return to Petropavlovsk-Kamchatsky. During the takeoff roll, the captain decided to abort for unknown reason. Unable to stop within the remaining distance (runway 01/19 is 1,725 metres long), the aircraft overran, lost its right main gear and rolled for dozen metres before coming to rest in about 50 centimeters of snow. All 26 occupants escaped uninjured while the aircraft was damaged beyond repair.

Crash of an Antonov AN-148-100E in Garbuzovo: 6 killed

Date & Time: Mar 5, 2011 at 1040 LT
Type of aircraft:
Operator:
Registration:
61708
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Voronezh - Voronezh
MSN:
41-03
YOM:
2010
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
6
Circumstances:
The aircraft departed Voronezh-Pridacha Airport in the morning to conduct a test flight with six crew on board, two pilots from the manufacturer, two engineers and two pilots from the Myanmar Air Force to whom the aircraft should be delivered. In flight, the crew decided to perform an emergency descent. During this manoeuvre, the aircraft reached an excessive speed and lost part of its tail, stabilizers and elevators. It entered an uncontrolled descent and crashed in a snow covered field located near Garbuzovo, bursting into flames. The aircraft was totally destroyed and all six occupants were killed. Tail parts, stabilizers and elevators were later found about 3 km from the point of impact. The airplane was operated by the Voronezh Aircraft Production Association. (VASO - Voronezhskoye Aktsionernoye Samoletostroitelnoe Obshestvo). First accident involving an Antonov AN-148.
Probable cause:
The cause of the accident was the inadvertently permitted the aircraft to accelerate 110 km/h above the design limit speed during an emergency descent. This led to low-frequency vibrations on the aircraft in all axes, an increase of alternating accelerations exceeding the margin of safety. The result was the break up of the aircraft in the air, followed by its collision with the earth.
The main factors contributing to the accident were:
- Untimely and inadequate actions of the crew to control the emergency decent,
- Lack of proper coordination among the members of the crew,
- Deviations from recommendations in the flight manual in executing the emergency descent,
- Misleading indications on basic instruments when outside characteristic operating conditions.

Ground fire of a Tupolev TU-154B-2 in Surgut: 3 killed

Date & Time: Jan 1, 2011 at 1525 LT
Type of aircraft:
Operator:
Registration:
RA-85588
Flight Phase:
Survivors:
Yes
Schedule:
Surgut - Moscow
MSN:
83A588
YOM:
1983
Flight number:
KGL348
Country:
Region:
Crew on board:
8
Crew fatalities:
Pax on board:
126
Pax fatalities:
Other fatalities:
Total fatalities:
3
Captain / Total flying hours:
12202
Captain / Total hours on type:
2780.00
Copilot / Total flying hours:
3775
Copilot / Total hours on type:
3279
Aircraft flight hours:
32354
Aircraft flight cycles:
13147
Circumstances:
Ready for taxi, the crew started the engines when a short circuit occurred and a fire erupted in the rear compartment. The evacuation of all 134 occupants was initiated but three passengers died while 32 others were seriously injured. The aircraft was totally destroyed by fire. The OAT was -29° C at the time of the incident.
Probable cause:
A short circuit emerged while the aircraft generators were connected to the aircraft's electrical system after start-up of the engines, via an APU. The short circuit caused a strong fire in the generators compartment in the tail which spread rapidly through the fuselage. The cause of the fire was an electrical arc produced by electrical currents exceeding ten to 20 times the nominal loads when two generators not synchronized with each other were brought online but got connected together instead of being connected to parallel busses. The following contributing factors were identified:
- Poor technical conditions of contacts TKS233DOD responsible for connecting the generators with the electrical busses, that were damaged by prolonged operation without maintenance. A contact normally open was welded and fractured insulation material moved between contacts that are normally closed. These abnormal contact positions led to the connection between #2 and #3 generators.
- Differences in the schematic diagrams of generator 2 and generators 1 and 3. When the switch is moved from "check" to "enable" with no delay in the "neutral" position generator 2 is brought online without time delay which leads to increased wear of normally closed contacts in the TKS233DOD unit.
- The specific design of the electrical systems to ensure power supply to each bus from either the APU or either engine integrated drive generator.
Final Report:

Crash of an Antonov AN-22A near Krasny Oktyabr: 12 killed

Date & Time: Dec 28, 2010 at 2130 LT
Type of aircraft:
Operator:
Registration:
RA-09343
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Voronezh - Tver
MSN:
043482272
YOM:
1974
Country:
Region:
Crew on board:
12
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
12
Circumstances:
The crew was returning to his base at Tver-Migalovo after he delivered a MiG-31 to the Voronezh Military Aviation Engineering University. While in cruising flight, the four engine aircraft entered an uncontrolled descent and crashed in a snow covered prairie located near Krasny Oktyabr. The aircraft was totally destroyed and all 12 occupants were killed.

Crash of an Antonov AN-24RV at Rogachevo AFB

Date & Time: Dec 14, 2010
Type of aircraft:
Operator:
Registration:
RA-47305
Survivors:
Yes
Schedule:
Arkhangelsk - Rogachevo
MSN:
5 73 103 05
YOM:
1975
Flight number:
AUL137
Country:
Region:
Crew on board:
7
Crew fatalities:
Pax on board:
32
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
After landing on runway 16 at Rogachevo AFB (Anderma-2), the aircraft encountered difficulties to stop within the remaining distance. It overran, lost its left main gear and came to rest 8 metres further. All 39 occupants escaped uninjured and the aircraft was damaged beyond repair.

Crash of a Tupolev TU-154M in Moscow: 2 killed

Date & Time: Dec 4, 2010 at 1436 LT
Type of aircraft:
Operator:
Registration:
RA-85744
Survivors:
Yes
Schedule:
Moscow - Makhatchkala
MSN:
92A-927
YOM:
1992
Flight number:
DAG372
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
160
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
17384
Captain / Total hours on type:
10000.00
Copilot / Total flying hours:
3111
Copilot / Total hours on type:
1150
Aircraft flight hours:
9285
Aircraft flight cycles:
2983
Circumstances:
Daghestan Airlines (Avialinii Dagestana) flight DAG372 departed Moscow-Vnukovo Airport at 1408LT bound for Makhatchkala, Daghestan. Fourteen minutes after takeoff, while cruising at an altitude of 9,000 metres some 80 kilometers south of Moscow, the crew informed ATC about the failure of the engines n°1 and 3 and was cleared to return to Moscow-Domodedovo Airport. On final, the aircraft descended below the clouds at a height of 500 feet but was not properly aligned with the runway centerline. It landed hard to the right of runway 32R, went out of control, impacted an earth mound and bushed before coming to rest, broken in two. Two passengers were killed while 78 other occupants were injured.
Probable cause:
Erroneous actions on part of the crew who, while landing in instrument meteorological conditions with one engine running, permitted the aircraft to touch down significantly to the right of the runway.
These actions were the result of following factors:
- The flight engineer inadvertently turned off the fuel booster pumps of the service tank while working the procedures for manual fuel transfer during the climb, which led to fuel starvation, all engines spooling down with the outer engines (#1 and #3) shutting down as well as loss of electrical power for 2:23 minutes due to loss of all three generators
- Failure by the crew to take use of all available possibilities to restore on-board systems after generator #2 was recovered and the APU spooled up and was successfully connected
- Failure to comply with recommendations "flying with two engines inoperative" and "approach and landing with two engines inoperative"
- Lack of leadership and lack of management and distribution of responsibilities by the captain leading to independent but not always accurate actions by the other crew members as result of insufficient training in crew resource management
- A complex wind environment varying with heights which contributed to the deviation from the proper approach trajectory while the crew was flying on stand by instruments rather than regular instruments
- Insufficient training of the crew as a whole as well as each individual to act in emergency and complex scenarios
- The non-implementation of safety recommendations developed in earlier investigations to prevent the flight engineer inadvertently turn off the fuel booster pumps.
Final Report:

Crash of a Cessna 208B Grand Caravan near Kirensk

Date & Time: Oct 2, 2010 at 1024 LT
Type of aircraft:
Operator:
Registration:
RA-67701
Flight Phase:
Survivors:
Yes
Schedule:
Lensk – Bratsk
MSN:
208B-0932
YOM:
2002
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
7
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
13358
Captain / Total hours on type:
4083.00
Copilot / Total flying hours:
4824
Copilot / Total hours on type:
757
Aircraft flight hours:
3203
Aircraft flight cycles:
1423
Circumstances:
The single engine aircraft departed Lensk at 0813LT on a flight to Bratsk. While cruising at 4,200 metres over the cloud layer, the engine failed. The crew elected to divert to Kirensk Airport but was unable to maintain a safe altitude. Eventually, the captain attempted an emergency landing when the aircraft impacted trees and crashed in a wooded area located 37 km west of Kirensk. All nine occupants were injured and the aircraft was damaged beyond repair.
Probable cause:
Engine failure due to the damage of the bearings of the planetary gear from the first stage of the compressor, leading to vibration and destruction of the turbine. It is possible the damage to the bearings was caused by the presence of aluminium or silicon oxide. However, it was not possible to determinate the source of this contamination.